DIN 1.2343 / AISI H11 Tool Steel

NOS411 Die Steel, Equivalent to 1. ESR

For further details, check out more information on our website.

NOS411 Die Steel for Hot Extrusion, Hot Forging, and Plastic Moulds
 
Key Characteristics
NOS411 is derived from SUPER technology as a premium hot work tool steel. This steel showcases remarkable attributes including high purity, uniform annealing structure, and exceptional impact resistance.
It is primarily utilized for manufacturing hot extrusion dies, hot forging dies, and large plastic moulds that necessitate enhanced toughness, coupled with requirements for polishing or dermatoglyph treatments.
NOS411 undergoes rigorous inspection in compliance with NADCA#207 standards, with additional properties being tested as per customer specifications.
 
Equivalent Grades

AISI

ASSAB

DIN

BOHLER

JIS

DAIDO

BS

H11

VIDAR1 ESR

1.

W400

SKD6

DHA

BH11

Chemical Composition (%)

C

Si

Mn

P

S

Cr

Mo

V

0.38
0.41

0.80
1.00

0.35
0.40

'
0.020

'
0.

5.00
5.50

1.40
1.70

0.30
0.50

Dimensions

Shape

Thickness / Diameter (mm)

Width (mm)

Round

100-500

/

Block

100-400

200-

Physical Properties (Q+T of 45HRC)

Temperature
ºC

Density
Kg/m3

Elasticity Modulus
Mpa

Thermal Expansivity
X 10-6/ºC

Thermal Conductivity
W/(mºC)

200

--

25

400

12.6

29

600

13.2

30

Mechanical Properties

Hardness
HRC

Tensile Strength (Rm)
Mpa

Yield Strength (RP0.2)
Mpa

44

48

Heat Treatment Processes
Soft Annealing
Heat the steel to 850ºC in a protective atmosphere, maintain for soaking, and then cool in the furnace at a rate of 10ºC/hr; allow air cooling once the temperature drops to 650ºC.
           
Stress Relieving
Perform stress relieving post-rough machining, heating to 650ºC, with a hold for 2 hours; subsequently cool slowly to 500ºC and continue with air cooling.
 
Hardening
Refer to the Hardening Diagram for procedure:
Preheat in two stages A: 650ºC and B: 850ºC
Austenitize at C: 990-ºC
Employ either direct cooling D or sectional cooling F: 500-550ºC


                  Hardening Diagram                 Tempering Diagram

Tempering
Refer to the Tempering Diagram to select appropriate tempering temperatures for desired hardness. For die-casting molds, temper at least 3 times.
For other applications associated with hot working or plastic molding, temper at least 2 times. (We suggest being tempered over 550ºC for a minimum of 2 hours. Post-tempering, allow cooling to room temperature.)
Advisory: Avoid tempering in the range of 425-550ºC to prevent temper brittlement.

Hardness: HRC                     Residual Austenite %
 
Tempering Temperature (2h+2h) ºC


Important Notes
1. Holding time refers to the total heating duration for die steel until Austenitization.
2. During the hardening phase, ensure the steel is heated to avoid oxidation or decarburization.
3. Steel needs immediate tempering once temperature falls to 50-70ºC.
4. For superior die properties, expedite the quenching speed while avoiding distortion or cracking.
If you require comprehensive information, please refer to the "Heat Treatment Manual" or contact us.

Quenching Holding Time and Thickness

Thickness
mm

Time
Sec

Thickness
mm

Time
Sec

5

60

50

300

10

90

60

390

20

160

70

420

30

240

80

440

40

280

90

495

For more details, please contact Jiebao.

Product Applications

Industry

Features

Recommended Steel Grades

Die Casting

Die Casting is a metal casting method characterized by exerting high pressure on molten metal into the mould cavity. It exhibits excellent performance against heat cracking, corrosion, cracking, and promotes red hardness.

NOS411,
NOS415,
NOS425,
NOS430,
NOS560

Hot Extrusion

Prior to extrusion, metal is heated above the recrystallization temperature, assuring high strength at elevated temperatures, high ductility, good toughness, thermal fatigue resistance, and thermal wear resistance, along with consistent anisotropic properties.

NOS411,
NOS415,
NOS425,
NOS430

Hot Forging

This involves processing above the recrystallization temperature, showcasing good thermal wear resistance, heat intensity, high ductility, and excellent toughness and thermal conductivity.

NOS411,
NOS415,
NOS425,
NOS430,
NOS560

Hot Stamping

Involves rapid molding and hardening of molds under heat, characterized by strong thermal conductivity, bending strength, and high toughness.

NOS411,
NOS415,
NOS425,
NOS430,
NOS560

Injection Molding

A process involving simultaneous injection and molding, prized for high polishability, corrosion resistance, wear resistance, and thermal conductivity.

NOS411,
NOS415,
NOS425,
GY336

Compression Molding

A method of forming thermosetting plastics using heat and pressure, typically for plastic molding reinforced with glass fibers. It offers excellent wear resistance and strength.

NOS411,
NOS415,
NOS425,
GY336

Blow Molding

This process uses gas pressure to transform raw materials into hollow products, characterized by medium strength and good thermal conductivity.

NOS411,
NOS415,
NOS425,
GY336

Extrusion Molding

Involves shaping plasticized materials into specific profiles via extrusion. Medium strength is achieved, with high demands for corrosion and wear resistance; nitridation is often employed for molds of fiber-reinforced products.

NOS411,
NOS415,
NOS425,
GY336

Quality Assurance

All production undergoes the following inspections:
(1) Radiographic Testing - RT;
(2) Ultrasonic Testing - UT;
(3) Magnetic Particle Testing - MT;
(4) Penetrant Testing - PT;
(5) Eddy Current Flaw Detection - ET
Company Overview:

Bozhong Group specializes in various formats of steel supplies such as coils, sheets, plates, rods, bars, tubes, pipes, beams, angles, flanges, wires, strips, and channels. Our extensive product range is notable for high purity, stable chemical composition, precise dimensions, and excellent surface quality. These products find application in sectors including automotive engineering, railway transport, aviation, aerospace, petrochemicals, energy, offshore industries, and military sectors, among others.

Bozhong Group commits to high-strength steel, wear-resistant plates, and other varieties along with specific European standard bars and pipes. Our worldwide sales and service network ensures timely delivery to clients around the globe.

Custom steel fabrication services are available, including oxygen cutting, plasma cutting, and laser processing. We are also equipped to perform ultrasonic testing adhering to EN standards and provide quality certifications from recognized entities such as TuV, LRS, GL, and CE.

Specialty steels that we offer include:
- Boiler and Pressure Vessel Steel
- Pipeline Steel
- Bridge Steel
- Nuclear Steel
- Structural Steel
- Die Steel
- High-strength Steel
- Abrasion-resistant Steel
- Weathering, Corrosion-resistant and Fire-resistant Steel
- Steel for High-rise Buildings
- Shipbuilding and Offshore Engineering Steel

Frequently Asked Questions:

Q: Are you a manufacturer or just a trader?

A: We consist of a group of companies owning manufacturing bases and a trading entity specializing in high-quality special steels like alloy, carbon, and stainless steel at competitive prices.

Q: How do you assure product quality?

A: We can furnish third-party certifications (TUV, CE) and maintain a robust inspection system across all processes. Quality is crucial for our enterprise's sustainability.

Q: What is your delivery timeframe?

A: A majority of material grades are stocked in our warehouse. Non-stock materials typically have a lead time of 5-30 days following confirmation of payment or order.

Q: What are your payment options?

A: We accept T/T or L/C.

Q: Can you provide a sample for our evaluation before finalizing an order?

A: Yes, samples can be provided for approval before placing a bulk order. Free samples are available when in stock.

Q: May we visit your company and factories?

A: Absolutely! We are pleased to organize accommodations in advance and offer airport pick-up services upon your arrival in China.

If you have any inquiries regarding H11 steel concerning pricing, applications, or heat treatment, do not hesitate to reach out.

: 

:  +86-769-

Fax:  +86-769-

Contact us for further discussions concerning your requirements for 1. steel. Our dedicated sales team is ready to assist you in finding the best options tailored to your needs.